checkin to mozilla/security/manager/Makefile.in also contains the fix
for bug 288647 to allow building NSS with system nspr. a=kengert for
branch-1.8.1.
Tag: MOZILLA_1_8_BRANCH
git-svn-id: svn://10.0.0.236/branches/MOZILLA_1_8_BRANCH@188902 18797224-902f-48f8-a5cc-f745e15eee43